Jump to content
SAU Community

Whirring noise at idle

Kinks

By Kinks,
in General Maintenance

 Share

Recommended Posts

Kinks Grand Master

Kinks

Posted
Posted

Had a strange noise start to show itself.. at idle I get a pronounced whirring noise which sounds like it's coming from the top of my engine. Seems loudest above the cam covers and only does it at idle, at higher RPM it goes quiet. Also only happens when the engine is up to temp, I think. Will have to check next cold start.

It definitely seems to be loudest above the engine, rather than at the front.. so I wouldn't think it would be any of the external belts (alternator etc). The engine's done 118k and the timing belt was done at 100k by the prev owner.

Any ideas? I'll try and grab some hose and do a bit of listening to see where it's coming from but I should probably take it to someone to find out what's going on. Suggestions would be helpful :D

Link to comment
https://www.sau.com.au/forums/topic/29584-whirring-noise-at-idle/
Share on other sites
Kinks Grand Master

Kinks

Posted
  • Author
Posted

It's not the clutch, it's not the injectors it's coming from the front of the motor.

Took it to a mech who agreed and said it could be the cam belt, could be the idler bearing. Also had someone else suggest water pump. But it is a belt/bearing noise IMO. Either way it doesn't look like it's possible to diagnose without pulling everything apart, and that won't happen before christmas...

Kinks Grand Master

Kinks

Posted
  • Author
Posted

Winds down? Mine will spin for a few second after the engine has stopped, that's normal unless the clutch is engaged in which case it should stop instantly.

It's not coming from the fan belt or clutch fan region, sounds like the front of the block, and if you listen closely it sounds like the noise is coming out from underneath the timing belt cover.

blind_elk Grand Master

blind_elk

Posted
Posted
Mine does exactly what Damo's does and most other's do, just the gearbox turning over/clutch.... hope thats all it is.

-rb25

It's usually the thrust bearing (the bit that actually presses on the fingers of the pressure plate). In my experience it's not a critical, must-fix, sound.
BIGBLOCKR31COUPE Experienced

BIGBLOCKR31COUPE

Posted
Posted

Try the old screwdriver stethiscope trick(tip against part & handle to ear). You may find that it is just the aircon belt idler pulley. This is quite common and can sound like it is coming from somewhere else. Once you have listened through a screwdriver you should be able to pinpoint the noise easily.

Kinks Grand Master

Kinks

Posted
  • Author
Posted

cheers, i will try it.. hopefully it's coming from somewhere trivially nonimportant like the air con pulleys.. which isn't even gassed so I should probably just remove the belt if that's what it is lol.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • Nightmare_mistress_R33
      CD009 RB Conversion

      By Nightmare_mistress_R33 · Posted

      It’s new. It’s the cd009. I did take the transmission apart to mill down the bellhousing and had both housings come off the gears so wondering is something isn’t in right. I am running redline. I can get it in gear running too but it’s just not easier and it’s almost like 2, 4, 6, and reverse all the back gears aren’t happy going in
    • Nightmare_mistress_R33
      CD009 RB Conversion

      By Nightmare_mistress_R33 · Posted

      I’ll remember that as a last choice. It’s brand new
    • The Bogan
      NC MX5

      By The Bogan · Posted

      Got keys and did a walk around the yard planning the landscaping works with the family that I will be doing Main effort: remove all the woodchip in the gardens that are around (attached) to the outside of the house and replace with 10mm blue metal, having woodchip close to the house is a recipe for inviting white ants, currently there are no white ants within the block and I would like to keep it that way I'll be buying some large raised garden beds to grow veggies and stuff, and the woodchip will be mulched with everything else that gets dug up, pulled out, or cut down during works Next will some minor drainage and landscaping maintenance up one side of the house, where the fuse box, AC, and solar stuff will go, about 12 mtrs long by 2 meters wide, I'll break up the soil, add gypsum and then I'll dig in a French drains about 300mm deep x 300mm wide and fill it with agg pipe and blue metal, then level out the whole area with a 50mm layer of blue metal, the soil, whilst currently pretty compacted, will break up well with the gypsum to aid in drainage, I'll then cover the area with a 50mm layer of more blue metal In saying this, the drainage issue is minor, but that little hidden away area down the side is untidy and weedy, and as all of the main elec stuff is there I want it neat and tidy to appease my OCD Again, the material excavated from the French drains with be added to the garden bed mulch, as will some rose bushes and some other crap looking garden plants, and a old apricot tree that is looking worse for wear The apricot tree is currently in a little roundish garden bed that is in the middle of the back yard with few other crappy looking plants around it, that will all be removed, levelled, re-turfed, and is a perfect spot for a hills hoist There is also a area about 3m x 2m between the rear fence and shed that will get some attention, it looks like some stuff was stored there and the grass is dead, that will also get broken up and mulched, and is a prime spot for a pumpkin patch I've guestimated that I'll need: 3 tonnes of blue metal, 12 meters of agg pipe, 5kg of Gypsum, and a hills hoist, so a few bags of concrete as well to set it in place (the house currently has one of those pull out 4 line jobs, whilst it works, I want a retro old school hills hoist), I am also going to run some chickens, there's a great spot for a coop, so a chicken coop to suit 4 of those lovely egg laying bitches will also be on the job card That should keep me busy for a while, and will finish off the back yard ready for a early spring planting of some veggies and berries  Once the main effort is done I'll start out the front, there's a large rock garden that could use some TLC, but that is only minor works Should be fully moved in within 2 weeks, the landscaping works will start then Fun times, retirement is good  
    • Murray_Calavera
      Steps to DIY sanding car back ready for respray....

      By Murray_Calavera · Posted

      It happens, that's what your single stage filler is used for.  If it is still visible after the 3 coats of 2k primer, it will be visible after the paint is laid down.  Its hard to give 100% perfect advice without being there in person, I'm very tempted to say stop where you are, fill your pin holes with a single stage putty first then keep going. 
    • TurboTapin
      CD009 RB Conversion

      By TurboTapin · Posted

      New or used transmission? Alignment will be the same with engine running or not. If new, i'm presuming it's a clutch release bearing size issue. If used, are you certain it's a CD009/A and not an older CD008 or less? They had known synchro issues. In my opinion, these transmissions should always be purchased new, they're dirt cheap and you avoid dealing with old revisions. 
×
×
  • Create New...